Are the Sunni schools and the Zaydi, Adhahrya, Ibadhya and others who believe in the principles of Islam, part of the Islamic nation? And what is the ruling on declaring one followers of these schools mentioned in the first question an apostate? [See glossary for an explication of terms.]
All these sects are considered Islamic except if they deny one of the requirements of Islam or insult the chaste Imams (see glossary).
[Note: For similar opinions, search: Amman Message.]